Backpack



FIG. 1 is a perspective view of a backpack showing an embodiment of mynew design;

FIG. 2 is a front view of the backpack as shown in FIG. 1;

FIG. 3 is a rear view of the backpack as shown in FIG. 1;

FIG. 4 is a right side view of the backpack as shown in FIG. 1;

FIG. 5 is a left side view of the backpack as shown in FIG. 1;

FIG. 6 is a top view of the backpack as shown in FIG. 1; and,

FIG. 7 is a bottom view of the backpack as shown in FIG. 1.

Any broken line illustration of environmental structure in the drawingsand selected other features that may be shown as attached to the claimeddesign is for illustrative purposes only and forms no part of theclaimed design.

The ornamental design for a backpack, as shown and described.